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Articles by Don R. Crawley

About the Author:

Don R. Crawley is author of The Accidental Administrator series of books for IT professionals, including The Accidental Administrator: Cisco ASA Security Appliance: A Step-by-Step Configuration Guide, from which this article is excerpted. He is also president of soundtraining.net, an IT training firm. He holds multiple certifications on Microsoft, Cisco and Linux products.